22220550440225 has 6 divisors (see below), whose sum is σ = 27553482545910. Its totient is φ = 17776440352160.

The previous prime is 22220550440167. The next prime is 22220550440243. The reversal of 22220550440225 is 52204405502222.

It can be written as a sum of positive squares in 3 ways, for example, as 2212168376896 + 20008382063329 = 1487336^2 + 4473073^2 .

It is not a de Polignac number, because 22220550440225 - 2⁶ = 22220550440161 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444411008780 + ... + 444411008829.

It is an arithmetic number, because the mean of its divisors is an integer number (4592247090985).

Almost surely, 2^{22220550440225} is an apocalyptic number.

22220550440225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22220550440225 is a deficient number, since it is larger than the sum of its proper divisors (5332932105685).

22220550440225 is an equidigital number, since it uses as much as digits as its factorization.

22220550440225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888822017619 (or 888822017614 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 22220550440225 its reverse (52204405502222), we get a palindrome (74424955942447).

The spelling of 22220550440225 in words is "twenty-two trillion, two hundred twenty billion, five hundred fifty million, four hundred forty thousand, two hundred twenty-five".